Well, I thought I'd take a look at what the most expensive home or estate in McLean is listed at. A new custom to be built home (designed by Harrison Design Architects TO BE BUILT by ALM Builders) is being marketed by Long and Foster, list price $29,900,000. You get 5 acres, 12 bedrooms, 15 bathrooms and 6 half baths...that's a lot of house...tehe. Take a look.